Originally Posted by Reeses

The thing is I rode it with no problems (and barely any sound) before, so maybe it was undertorqued? And Sheldon Brown says "I have a lot of experience mixing ISO/J.I.S. in both directions on my own personal bikes, and it as never given me a lick of trouble." and "In practice, you can very often get away with mixing these sizes, as long as you select a spindle length that gives the desired chainline."

I took a tape measure to my chainring/seat tube and my chainline is off by 3 mm. Measured from the center of the seat tube to a tooth and got 45 mm